The national flag of Guinea-Bissau was adopted on 24 September 1973, the day the country proclaimed its independence from Portugal.

The party was established in 1956 to peacefully campaign for independence from Portugal during its Estado Novo regime but turned to armed conflict in the 1960s and was one of the belligerents in the 1963–74 Guinea-Bissau War of Independence.

The PAIGC party flag was derived from that of Ghana, which was the first design to use the Pan-African combination of red, yellow, green, and black in 1957.

[citation needed] In the Ghanaian view, the black star stands for the unity of Africa.

The colors have the same meanings: specifically, the red is for the blood of martyrs, green for forests, and gold for mineral wealth.